- Laboratories Dental, Florissant
- Laboratories Medical, Florissant
- Ladies Ready To Wear, Florissant
- Land Surveyor, Florissant - Land Surveying Services
- Landscape Contractors & Designers, Florissant
- Landscaping, Florissant
- Landscaping Materials & Supplies, Florissant
- Laser Hair Removal, Florissant
- Late Night Restaurants, Florissant
- Laundromats & Dry-Cleaning, Coin-Operated, Florissant
- Laundry Equipment Rental & Leasing, Florissant
- Laundry Self Service, Florissant
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Florissant
- Lawn & Garden Equipment & Supplies, Florissant
- Lawn & Garden Services, Florissant
- Lawn & Garden Sprinkler Systems, Florissant
- Lawn Maintenance Services, Florissant
- Lawn Mower Repair & Blade Sharpening Service, Florissant
- Lawn Mowers & Power Equipment, Florissant
- Lawyers & Attorneys, Florissant
- Legal & Tax Services, Florissant
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- Legal Professionals, Florissant
- Life Insurance, Florissant
- Lighting Fixtures & Equipment, Florissant
- Lighting Fixtures Repair, Maintenance & Installation, Florissant
- Limousine Service, Florissant
- Lingerie & Underwear for Women, Florissant - Bras, Panties, Bustiers, Corsets & More
- Liquor Stores, Florissant
- Living Room Furniture, Florissant
- Loans Check Cashing, Florissant
- Loans Personal, Florissant
- Loans Title Services, Florissant
- Locks, Florissant
- Locksmiths, Florissant - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Florissant
- Lodging, Florissant
- Long Haul Trucking Companies, Florissant
- Lottery Game Retailers, Florissant
- Lp Gas Equipment & Supplies, Florissant
- Lumber & Lumber Products, Florissant
- Lumber & Lumber Products, Florissant
- Lutheran Church, Florissant
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